Classification of Bulletproof Glass for Different Level of Bullet Resistance
We are in an evolving world where terrorist attacks, gunfire, burglary, and vandalism are fast becoming part of our day to day life. This has created the need for advanced protection with new protective products.
HOW A BULLETPROOF GLASS STOPS HIGH-SPEED BULLET?
To stop a baseball moving at high speed, the trick would be to move the hand back and bring the ball to a stop gradually to decrease its speed level. The speed reduction reduces the force of the ball on your hands, so catching the ball would cause little to no hurt.
The force exerted by the baseball on your hands is proportional to the momentum change rate of the ball. Stopping it by bringing it to a stop gradually will change the momentum and reduce the force the hands feel on impact. If you stop the baseball without taking steps to reduce the momentum, you would feel a large smack on your hands, and your hands would absorb all the force from the impact, which would cause pain.
The hand can move, but a piece of glass cannot. When a bullet is fired at the standard glass, the glass cannot bend or move to the back to gradually absorb the energy of the shot, and the glass shatters without any decrease to speed. Standard glass does not offer any protection against bullets.
Bulletproof glass is different in comparison to standard glass. It is built from several layers of sturdy glass mixed in between with multiple layers of plastic. This sometimes includes a final interior layer of a film of plastic or polycarbonate, all used to prevent glass shards or splinters from impact with a bullet. This compression of layers is referred to as a laminate and can be ten times stronger and heavier than standard glass.
When a bullet makes contact with bullet-resistant glass, the force of the bullet spreads through the glass layers sideways. Due to multiple layers of plastic and glass that have been compressed together, the bullet’s force is absorbed quickly. This reduces the momentum of the shot and prevents it from cutting through the glass. In a case where it does cuts through, the damage caused would be very minimal.
The glass sheet in the bullet-resistant glass may break from the impact, but the presence of plastic will prevent glass shards and splinters from flying and falling apart.
A bullet-resistant glass stops and resists bullets by absorbing the force from the bullet when contact is made and quickly distributing this sideways through the laminate.
DIFFERENT CLASSIFICATIONS OF BULLET-RESISTANT GLASS
Bullet resistant glass is classified into eight levels, according to Underwriter’s Laboratory (UL). These levels were assigned using the standards of UL752 resistance to bullets. UL developed a set of quality tests and standards that are generally accepted.
The numbers used in the classification is equivalent to the firearm types and bullets that each level can resist. Buying any level of Bulletproof glass you can search online Bulletproof glass near me or You can also visit here: https://www.fabglassandmirror.com/bullet-proof-glass
Level one through level three offers bullet protection against different handguns up to magnum .44. Level four protection through levels eight offers bullet protection against rifles and military weapons of higher speeds.
Level one covers bullet resistance glass that can withstand shots from small handguns. Level one bullet resistance glass can withstand three shots fired from a full metal copper jacket 9mm gun with a lead core. Any level one bullet resistance glass should weigh 8 grams. It can resist bullets with 1171 feet per second speed and a maximum of 1293 feet per second speed.
Level two covers bullet resistance glass that can withstand shots from large handguns. Level two bullet-resistant glass can withstand three shots fired from a Magnum .357 jacketed lead soft point. Any level two bullet resistance glass should weigh a minimum of 10 grams. It can resist bullets with a speed of 1250 feet per second speed and a maximum of 1375 feet per second speed.
A level three bullet-resistant glass can withstand shots from large handguns. It can resist three shots fired from a Magnum .44 lead semi-wadcutter gas checked. A level three bullet-resistant glass usually weighs a minimum of 15.60 grams. It can resist bullets with a minimum speed of 1350 feet per second speed and a maximum of 1485 feet per second speed.
A level four bullet-resistant glass is an upgrade in ballistic protection. It can resist only one shot fired from a Caliber.30 rifle lead core. A level four bullet-resistant glass usually weighs a minimum of 11.70 grams. It can resist bullets with a minimum speed of 2540 feet per second and a maximum of 2794 feet per second speed.
A level five bullet-resistant glass covers a bullet resistance protection that can resist one shot at least fired from a Rifle lead core full metal jacket 7.62mm. A level five bullet-resistant glass usually weighs 9.70 grams. It can resist bullets with a minimum speed of 2750 feet per second and a maximum of 3025 feet per second speed.
A level six bullet-resistant glass is a direct upgrade to Level one bullet resistant glass. It can resist five bullets from a full metal copper jacket 9mm gun with a lead core. A level six bullet-resistant glass usually weighs 8 grams. It can resist bullets with a minimum speed of 1400 feet per second and a maximum of 1540 feet per second.
A level seven bullet-resistant glass covers a bullet resistance protection that can resist up to five shots fired from a rifle lead core full metal jacket 5.56mm. A level five bullet-resistant glass usually weighs 3.56 grams. It can resist bullets with a minimum speed of 3080 feet per second and a maximum of 3388 feet per second speed.
A level eight bullet-resistant glass is the highest level of protection that exists in bulletproof glass. It can resist up to five shots fired from a rifle lead core full metal jacket 7.62mm. A level five bullet-resistant glass usually weighs 9.70 grams. It can resist bullets with a minimum speed of 2750 feet per second and a maximum of 3025 feet per second speed.
DOES BULLETPROOF GLASS REALLY PROVIDE RESISTANCE TO UNLIMITED BULLETS?
Bulletproof glass does not offer protection from unlimited bullets; neither is the protection the glass provides unlimited. The job is to resist shots fired at it and not as an impenetrable barrier against bullets.
Bullet resistant glass is designed to resist the first few shots fired at it. This will give people who are within the environment enough time to escape to a safe place or move away from the area of danger.